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Re: [Qemu-devel] [PATCH 1/2] xen_backend: introduce xenstore_read_uint64
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From: |
Peter Maydell |
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Subject: |
Re: [Qemu-devel] [PATCH 1/2] xen_backend: introduce xenstore_read_uint64 and xenstore_read_fe_uint64 |
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Date: |
Tue, 17 Dec 2013 17:56:31 +0000 |
On 17 December 2013 17:30, Stefano Stabellini
<address@hidden> wrote:
> Signed-off-by: Stefano Stabellini <address@hidden>
> ---
> hw/xen/xen_backend.c | 18 ++++++++++++++++++
> include/hw/xen/xen_backend.h | 2 ++
> 2 files changed, 20 insertions(+)
>
> diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
> index 197795f..5f9be5a 100644
> --- a/hw/xen/xen_backend.c
> +++ b/hw/xen/xen_backend.c
> @@ -112,6 +112,19 @@ int xenstore_read_int(const char *base, const char
> *node, int *ival)
> return rc;
> }
>
> +int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval)
> +{
> + char *val;
> + int rc = -1;
> +
> + val = xenstore_read_str(base, node);
> + if (val && 1 == sscanf(val, "%"PRIu64, uval)) {
PRIxxx are printf format macros, not scanf format ones. You want
SCNu64
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/inttypes.h.html
thanks
-- PMM